Hi. I have a chart where I need to add new data points and sometimes modify existing ones. When I replace an existing item in the collection, the change is reflected on the screen. However, the following is not working for me:
- adding a new data point to the observable collection does not update the chart
- replacing an existing Brush in the BrushCollection does not update the chart
- add a new Brush in the BrushCollection does not update the chart
I have attached a simple example which demonstrates these issues. Am I doing something wrong? Is there a work around for this.
Thanks,
Arthur
Hello Arthur,
Thank you for your post. I have been researching this functionality and it turns out that this is the design behavior of the GroupBy in this scenario. In order to be able to update the chart when adding a new point, you can set the AutoGenerateSeries to false before adding a new point and setting it back to true, after adding the point in the source of the GroupBy. I have modified the sample that you have originally attached to show how you can implement this approach.
Also you can submit a new Product Idea for having this functionality built-in. You can suggest new Product Ideas for future versions (or vote for existing ones) at http://ideas.infragistics.com.
Steps to create your idea:
Log into the Infragistics Product Ideas site at http://ideas.infragistics.com (creating a new login if needed).
Navigate to the product / platform channel of your choice (e.g. WPF, Windows Forms, ASP.NET, HTML5 / Ignite UI, iOS / NucliOS, etc.)
Add your product idea and be sure to be specific and provide as much detail as possible. Explain the context in which a feature would be used, why it is needed, why it can’t be accomplished today, and who would benefit from it. You can even add screenshots to build a stronger case. Remember that for your suggestion to be successful, you need other members of the community to vote for it. Be convincing!
The benefits of submitting the product idea yourself include:
Direct communication with our product management team regarding your product idea.
Notifications whenever new information regarding your idea becomes available.
Additional benefits of the Product Idea system include:
Ability to vote on your favorite product ideas to let us know which ones are the most important to you. You will have ten votes for this and can change which ideas you are voting for at any time.
Allow you to shape the future of our products by requesting new controls and products altogether.
You and other developers can discuss existing product ideas with members of our Product Management team.
The product ideas site allows you to track the progress of your ideas at any time, see how many votes it got, read comments from other developers in the community, and see if someone from the product team has additional questions for you.
Thank you for contacting Infragistics.
Sincerely,
Krasimir, MCPD
Developer Support Supervisor - XAML
Infragistics
www.infragistics.com/support
Thank you for the response. One issue that I see is that the screen refreshes when Add is selected - even if I fix the min and max values for the x-axis which in my case I know. This will be problematic when I have thousands of data points. Another issue is that I do not want a repetitve set of brushes. The brush for each data point could possibly be unique.
Regards,
Thank you for your email. I have been further investigating this and it seems that currently this is the expected behavior of the XamDataChart in this scenario. What I can suggest is submitting a new Product Idea for having the collection changed support for the GroupBy.
Please let me know if you need any further assistance on the matter.
Thank you Krasimir,
It has been frustrating converting my app from using Infragistics 11.1 to 14.2. Features that I had working in XamChart no longer function with XamDataChart in 14.2.
Thank you for your reply and the feedback on this. If you would like to have some feature in the controls, I can suggest submitting it as a Product Idea. The new features for the controls are based on the requests.
Please let me know if I can assist you with anything else.